Update CACHING.md

architecture/CACHING.md

@@ -34,6 +34,36 @@ package provides two different middlewares:
 
 ## Cache Invalidation
 
+### Keys Structure
+
+Keys have such format:
+
+`query:<chain_name>:<method_name>:<keccak256(body)>`
+
+For example:
+
+`query:local-chain:eth_getBlockByNumber:0x72806e50da4f1c824b9d5a74ce9d76ac4db72e4da049802d1d6f2de3fda73e10`
+
+### Invalidation for specific method
+
+If you want to invalidate cache for specific method you may run such command:
+
+`redis-cli KEYS "query:<chain_name>:<method_name>:*" | xargs redis-cli DEL`
+
+For example:
+
+`redis-cli KEYS "query:local-chain:eth_getBlockByNumber:*" | xargs redis-cli DEL`
+
+### Invalidation for all methods
+
+If you want to invalidate cache for all methods you may run such command:
+
+`redis-cli KEYS "query:<chain_name>:*" | xargs redis-cli DEL`
+
+For example:
+
+`redis-cli KEYS "query:local-chain:*" | xargs redis-cli DEL`
+
 ## Architecture Diagrams
 
 ### Serve request from the cache (avoiding call to actual backend)